when i start mastrubation with a minute i am getting sperm

The reason this happens is probably because you are still young and inexperienced and haven’t learned to control your ejaculation.
In order to do so, you need to practice with masturbation to postpone your ejaculation.
You can use the so called “start and stop” technique. This is how it goes: you start masturbating (stimulating) and when you feel that you would ejaculate you stop for about 20-30 seconds. Then you continue with the stimulation until you are ready to ejaculate but you may withdraw a couple of time before you ejaculate. I know that the purpose is to ejaculate and that refraining from it doesn’t sound so tempting but if you want to learn to prolong stimulation without ejaculation, you need to practice.
You can also try the squeezing technique in which you squeeze below the tip when you are about to ejaculate and the start with the stimulation again. You can perform this technique a few times as well.
Remember, it may not work well from the very beginning but practice makes perfect!!!

I recently started masterbating but i never come near to coming, i thought the first couple of times it would be within a few minutes, but i seem to cum in my sleep i wake up and im ejaculating, is this normal

thats wat you call a wet dream

Medical term its called Nocturnal Emission, basically, when you dream, you may not know what your dreaming or understand what your dreaming, you could have sperm be ejected from the penis during sleep, sometimes you'll wake up and have an erection, during the years I was going through puberty it was tough scary because I had no idea if it was normal. But now I am 18 years old and I have learned its normal. So don't break a sweat.